SPEAKER DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a speaker device capable of preventing the degradation of sound quality and improving sound pressure characteristics in not only a low pitch band but also in middle and high pitch bands. SOLUTION: The speaker device includes: a housing 2; a piezoelectric film diaphragm 3 having flexibility to be attached to the housing 2 so as to form an acoustic cavity 20 between it and the housing 2; and a speaker unit 4 having a diaphragm 21 to be attached to the housing 2. It is characterized in that the speaker unit 4 is attached to the housing 2, and the diaphragm 21 of the speaker unit 4 and the piezoelectric film diaphragm 3 are simultaneously vibrated. COPYRIGHT: (C)2010,JPO&INPIT